Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 613 · 40 questions

Remember (Line them up, add them up): Series (+ to −): total voltage = add the cells; n identical cells = n × one cell. Parallel (identical cells, + with +): the voltage stays the same as one cell. The bump end is +, the flat end is −; the long line in the symbol is +.

1. 1.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
2. 2.🔋 8 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
3. 3.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
4. 4.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
5. 5.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
6. 6.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
7. 7.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a smaller voltage (c) a bigger voltage (d) no voltage
8. 8.🔋 2 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
9. 9.🔋 4 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
10. 10.🔋 What should you do with used-up cells? (a) cut them open (b) give them for recycling (c) throw them in a fire (d) bury them in soil
11. 11.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
12. 12.🔋 6 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
13. 13.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
14. 14.🔋 How many 2 V cells must be joined in series to give 8 V?
15. 15.🔋 5 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
16. 16.🔋 A 6 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
17. 17.🔋 4 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
18. 18.🔋 3 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
19. 19.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
20. 20.🔋 6 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
21. 21.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
22. 22.🔋 How many 3 V cells must be joined in series to give 18 V?
23. 23.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
24. 24.🔋 A 9 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
25. 25.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
26. 26.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
27. 27.🔋 4 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
28. 28.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) a kind of bulb (d) two or more cells joined
29. 29.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
30. 30.🔋 How many 3 V cells must be joined in series to give 15 V?
31. 31.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
32. 32.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
33. 33.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
34. 34.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
35. 35.🔋 6 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
36. 36.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
37. 37.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
38. 38.🔋 8 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
39. 39.🔋 5 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
40. 40.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =

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